Thanks Burt,
Well, first I want to say I am new to OJB so maybe I havent fully understood
what can be read at the website. That said, this is what I mean :
When doing standard BMP EJBs or JDBC I am used to configuring a Datasource
in Tomcat
which is a standard interface to a pool of connections that I can configure
in the Context tag of Tomcats server.xml. I name this myDatasource and cann
access it from my business delegate or any bean using
...
Context ctx = new InitialContext();
DataSource ds = (DataSource)ctx.lookup("java:comp/env/myDatasource");
conn = ds.getConnection();
etc...
Here the Datasource is a common interface to the pool of connections setup
my Tomcat.
Now, in the OJB/JDO case, all examples I have seen (also in the web case)
let the client create a new factory for each access :
PersistenceManagerFactory factory = new OjbStorePMF();
PersistenceManager pm = factory.getPersistenceManager();
Transaction tx = pm.currentTransaction();
etc ...
I thought this was a gigantic overhead creating a new factory for each
client call ?
Are you saying that behind the factory a pool of connections is already
handled and I need to do nothing to configure Tomcat ? Is there no need to
setup a JNDI name ?
I found all the different type of ConnectionFactories in OJB.properties, but
didnt really get it since I thought this was the containers (ie Tomcats) job
to handle, for example using jakarta-commons-dbcp. So what I am saying is
that all I need is a pooled connection to the underlying database.
Thanks for help !
----- Original Message -----
From: "BURT, RANDALL (CONTRACTOR)" <[EMAIL PROTECTED]>
To: "OJB Users List" <[EMAIL PROTECTED]>
Sent: Thursday, June 05, 2003 3:37 PM
Subject: RE: How to configure OJB with Tomcat
> Pooling other than what OJB provides?
>
> -----Original Message-----
> From: Lukas Severin [mailto:[EMAIL PROTECTED]
> Sent: Thursday, June 05, 2003 6:36 AM
> To: OJB Users List
> Subject: How to configure OJB with Tomcat
>
>
> I read the documentation about setting up OJB in a servlet. However I
> couldnt find any instructions on how to configure connection pooling (eg
> using jakarta-commons) together with OJB in Tomcat so that connections to
> the database is pooled. Are there any synchronization issues to be careful
> about ?
>
> Can anyone point me to the right doc, or help me out with example tomcat
> descriptors and client code ?
>
> Thanks !
>
>
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